Method of making pneumatic tires



N.`w. MCLEOD. TWE-NIOD 0F MAKING PNEUMAUQURES.

` 4 APPLICATION FILED SEPT. 1B. 1916.

5 SHEETS-SHEET 1'.

'1,328,006c, Patented, Jan.'13, 1920. v'

N. W. IVIcLEOD.

METHOD 0F MAKING PNEUMAIIC TIRES.

APPIICATION FILED SEPT. au. 19.56.

l ,328,A0., Patented Jan. 13, 1920.l

5 SHEETS-SHEET 2.

AN. vv. MCLioD. 5 METHOD 0I" MAKING PNEUMATIC TIRES.

APPLICATION FILED SEPTJU; I9I6.

I Patented Jan. 13, I92L "Laasoa 5 SHEETS-SHEET 3- N. W.MCLE0D.

METHOD 0F MAKlNG RNEUMATIC TIRES. APPLICATION man sensu. 191e.'

1,328,O6, Patented Jan. 13, 1920.

5 SHEETS-SHEET 4.

' v?" fw@ ric associatedl therewith;

" tra. i l

NELSN W. MCLEOD, OF ST. LOUIS, MISSOURI.

ninrnonor MAKING PNEUMATIC Trans.

ATo all 'whom t may concern.

Be it 'known that I, N nLsoN W. MoIsnoD, a

`citizen of theUnited States of America, a resident of tliecity of St. Louis, State of Missouri, have invented certain new and useful Improvements in Methods of Making Pneumatic Tires, of which the following is a full, clear', and exact description, referto provides-simple and inexpensive Inethod 'of producing a strong and durable cord tire skeleton. In making my tire skeleton, loops are formed at the margins o f -a cord Web, and one oi the'objects of the invention is to provide asiinple method of anchoring these loops very firmly, thereby securely holding all of the cordelements at the margins of the cord web.

Figure I is a side elevation showing an annular cord-receiving core and a portion o' the toothed loop retaining ring. Y

Fig. II is a side elevation of a sectional bead ring adapted to be inserted. through a marginal portion of the cord web.

Fig. III is a transverse section taken through the annular core and also through the annular rows of cord holding elements Fig. IV is an enlar ed fragmentary diarammatical View, loo ring in the direction indicated by arrow IV, in Fig. III.

Fig. V is a diagram, on a reduced scale,

illustrating the method'of Winding the cord elements, 'theelements of the outer ply being shown by full lines, and the elements of the inner ply being shown by dotted lines. Fig. VI is a`transverse section showing atWo-ply cord skeleton as it appears after the marginal loops have heen removed from the annular rows of cord holding elements and shifted toward the annular core.

Fig. VII is a transverse section of the completed tire. p Fig. VIII is a diagrammatical plan View showing the manner iii-Which the oppositely inclined cord elements are anchored on the. bead rings.

Fig. IX is a side elevation of the parts shown in Fig. VIII.

Briefly stated, the method hereinafter described includes the steps of Winding cord onto cord holding members to form a cord Specification ofpetters-Patent.

Application filed September 18, 1916. Serial No. 120.6852

"Patented Jan. is, ieee.

Webhaving diagonal cordelements and loops. at the ends ofsaid cord elements; then Winding cord diagonally of said cord web to form a second cord Web having its coi-l elements inclined oppositelyv to the vfirst mentioned cord elements, at the same time forming loops at the ends of theA cord ele-4 iiients of' the second web. The loops of each cord Web are preferably arrangedalternately between the loops of the othervveli.v The eyes olf the alternating loops' are preferably in alinement with each other sothat a coi'dretainingdevice may be readily inserted through the loops While the latter are held by the cord holding members. After the :bead rings, orother suitable cord retaining members have been inserted through the alined loops, all of thevloops may be released from themeinbers on which they were formed. The opposite'ly inclined cord elements Will then be anchored at the' bead rings, as' shown most clearly in Figs. VIII and IX. The final steps involved in making a tire are suggested by Figs. III,

To facilitate the description of my method, I have shown an apparatus comprising a collapsible annular core 1 conforming approximately to the shape of atire, a collapsible-or contractile ring 2 surrounded by said core, a separatingvring 3 arrangedvbetween the core andthe ring 2. The annular cord holding Velements supported by the ring 2 include a pair of contactible loop retaini'ngrings 4 (Figs. I, III and IV) arranged at opposite sides of the annular core 1 and' provided 4With teeth 5 adapted to receive thecord elements, said rings-4: being adjustably secured yto the ring 2 by 'means of set screws 6 as shown in Fig. III. Rings 7, fitted to the side marginsof ring 2 (Figs. III and IV) are -provided with pockets for the reception of annular rows of cylinders 8 provided with arc nate cord holding hooks 9. Each, hook 9 is formed concentrically with the axis4 of the cylinder 8 to which it is secured (Fig.

IV) and all of the cylinders 8 may be turned from' the positions shown in the drawings for the purpose o-f releasing all of the cord loops from the hooks 9. The annular rows of hooks'f) arelocated at'opposite sides of the plane of the annular core l and separated from the side faces of said annular core, as shown 'most clearly in Fig. III.

Each cylinder 8 isA provided with an op l III and IV) `which erating arm 10 (Figi. n lies betweentwo of t e teeth 11 on anioperating rin 12. Screws 13, passing through slots in t eA operatinring 12, securesaid ringto thering 7. perating-handles 14, extending from the rings 12, may be' actuated to'turn said rings 12,.th`erely shifting vthe operatin ,arms 10'so as to turn the cylan outer cord web A- lwhc'zhf'overlies 'an in l inders 8 an the positions shown in Figs. lIII and I ,duringthe winding operations.

' Thetire skeleton I havel shown comprises nel" cord .web B', andV bead fri-rigs; C passing lthrough loops 15 and" 15l at thes'ide" margins of the cord webs. -'The inner web is formed by windingfcord diagonally of the annular core, from the lhooks 9- atone side of the core to the hooks 9 at` the opposite side thereof. Thecordis wound onto the hooks 9 and inserted between the teeth 5 on the loop re- `tainin rings 4, thereby forming the loops '15 which lie at angles to the diagonal cord elements, as shown in Figs. III and' IV..

The loopsare thus turned in a very simple manner 'to placetheir eyes in circumferenftial alinement. Two circular rows of loops ring, may be readily inserted through'the l -hereinafter pointed out.

15 are formed at the respective margins of the cord web B, and the open eyes of the loops at each margin areA alined with each other so that a cord retaining device or bead loops.- e outer cord web A is a formed by winding cord diagonally of the core from the hooks 9- at one side to the hooks 9 at the opposite side of the core. The diagonal cord elements of the outer cord web are inclined oppositely tothe diagonal elements of the inner web. In making the outer web, loops 15 are formedr on thehooks 9,'the outer end of each loop 15. beine' closely fitted. to a loop 15,0f the inner we The loops 15 are arranged'alternately between the loops 15 (Fig. IV) .for a purpose which will be Th diagonal cord elements of each web lie close to each other as shown in Fig. IV,

and although the margins of the cord'webs are formed in a circularspace considerably smaller'than' the circle-at the periphery of the core, it willbe noted that the cord is not severel compressed or crowded at the margins o the webs. This is 'due -to the manner in'which the loops are `formed at the marginal portions of the web. Each loop forms a continuation of two diagonal cord elements,but the terminal of each ioop lies in the smaller circle of the annular.

structure, and in this circle it occupies a space equal to the thickness of only .one cord. In other words, each loop is-cemposed of two diverging portions '(Fig. IV) which occupy 'zi-comparatively small space hooks 9. -'The hooks'r9 occup at the innercircle of the web. This is an advantage in winding the` cord', and it also improves'the finished article; y

I do not deem it necessary "to show the mechanical winding device whereby the cord is placed on the cord holding elements, for

this may bejdone by any suitable /me'cha nism, and it' is possible to wind ,the cord by hand.

To facilitate the winding operations, the cord holding elements at the margins of the cord skeleton, are separated from the sides of the annular core 1.

remote from the core, and in a plane where the loops may be readily formed on' the hooks 9 and loop retainers 4. After the an nular skeletonv has been formed in this manner, its side marginal portions extend toward the axis of the annular core and away from the side faces oi the core, as

seen in Fig, III.

Since all of the cord loops 15 and 15 at each margin of the skeleton are held in cirveumferential alinement with each other by This allows the marginal cord elements to be -ormed ata point the hooks9 and loop retainers 4, the beady rings C may these loops.

III) is preferably ase'ctional device coinprising two circular sections 18 and 18' each having free ends 19 adapted to be separated be readily inserted through.. Each bead ring (Figs. II andv from each .other and inserted throu h the alined loops 15 and'l. To avoid t e ne-, cessity of fastening the ends of the circular sections aftervv they have been inserted through the loops, the free ends 19 of one of said sections are located at points remote from the free ends o the other section asshown in Fig. II. It will be noted that the' 'bead rings constitute a. very simple means for retaining the cord loops in the relative l positions shown in the drawings.

After the loops have been secured by the bead rings, the cylinders 8 are turned tov releasethe hooksS) from'the loops;y The,"

,nelA

rings i and 7 are then removed fromf/themam supporting ring 2. Thereafter, the marglns of the cord skeletonare forced onto the annular tire forming-core 1 las shown in Fig. VI. 1When the hooks 9 and rings 4 are released from the loops, the inarginsof thc skeletorl` free and somewhat dense,

rubber 22 (Fig. VII) covering the skeleton at the tread, Asides andvbeads of the tire.

and diagonal cord elements connecting said loops, Winding cord diagonally of said cord web at an angle to the inclination of said cord elements to produce a second cord web which overlies the first mentioned cord web, at the same time placing the loops of the vsecond web alternately between loops of the other web, inserting bead rings through the alternating loops at the respective margins of the double cord web, and removing said cord holding members from the loops.

12. The method of making annular cord tire skeletons which comprises winding cord onto cord holding members to form a cordweb having diagonal cord elements and loops at the endsof saidpcord elements,

winding cord diagonally of said cord web to form a second cord web having its cord elements inclined oppositely to the inclination of the first mentioned cord elements, atthe same time forming loops at the ends of the cord elements of the second web and placing the loops at angles to the cord elements leading therefrom, arranging the loops of one web alternately between loops of the other web so as to form separated pairs of loops, each pair being a loop of one web firmly fitted to a loop of the other Web so that both cord element-s of each loop will be firmly held by a companion loop, and forming beads at said loops.

13. The method of making annular cord tire skeletons which comprises placing-annular cord holding devices at opposite sides of the plane of an annular cord holding core, said annular cord holding devices be-A ing separatedfrom said core and arranged in a circle smaller than the 'diameter' of the peripheral 'face of the core, Winding cord transverselyf said core-and from one of 'said annular cord holding devices to the other so as to form a cord web having its marginal portions separated from the core, and thereafter shifting the marginal por tions of the cord web to the core.

14. The method of making annular cord tire skeletons which comprises placing annular rows of cord holding members at opposite sides of the plane of an annular core7 said annular rows of cordholding members vbeing'separated from the side faces of the core, wln'dmg cord transversely of the, pe-

tions on 4said side faces.

l5. The method of making annular cord tire skeletons which comprises placing an nular rows of cord holding members at op poste sides of the plane of an annular core, said annular rows of cord holding mem bers being separated from the Side faces of the core, Winding cord transversel7 of rom the peripheral face of said core and one of the annular rowsv of cord holding members to the other so as to form an annular cord Web having marginal 'portions which extend inwardly and away from the side faces of the core, inserting bead rings into the edges of the cord web, thereafter moving said bead rings toward the side faces of the core, and shaping said marginal portions of the cord web on the side races ofthe core.

l NELSON W. MGLEOD. 

